Jianzhu Gangjiegou Jinzhan在万向减震球型钢支座的基础上对其弹簧元件进行耗能设计，提出了一种新型耗能减震球型钢支座，采用钢板弹簧叠加耗能钢作为耗能减震元件。通过单调拉伸加载试验和循环拉伸加载试验，研究了Q295钢材的耗能能力，采用拟静力试验和数值分析相结合的方法，分析了支座耗能减震元件的滞回性能和自复位性能；将该新型球型钢支座应用于网架结构中，考察其耗能减震能力。研究结果表明，Q295钢材的滞回曲线饱满，具有一定的耗能能力；减震元件的耗能减震性能较好，并且具有一定的复位能力；相较于一般的弹性减震支座 ...
温旭, 姜兰潮, 秘红丹, 刘立妍
doaj
Jianzhu Gangjiegou Jinzhan依托输电线路实际工程，选取输电铁塔主材与横担连接处钢管角钢组合节点为研究对象，采用数值软件ABAQUS建立了钢管角钢组合节点精细化有限元模型，基于静力加载试验验证了有限元模型的合理性；随后模拟分析了组合节点的传力机理和应力分布，明确了不同参数对组合节点受力特性的影响规律。结果表明，钢管、中环板与竖向板相交区域的应力集中且最大应力达到屈服强度，并向四周扩散且逐渐减小，中环板厚度和竖向板厚度是影响组合节点极限承载力的关键因素。基于有效宽度法计算了中环板和竖向板的承载能力，建立了不同板件内力占比计算公式 ...
张丽娟 +4 more
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Jianzhu Gangjiegou Jinzhan, 2013 国内外大量研究结果表明,能够实现梁端塑性铰外移的狗骨式连接具有良好的塑性变形能力。但由于其翼缘局部削弱使得梁的抗弯刚度退化,因此狗骨钢梁的局部屈曲和侧向失稳问题值得关注。采用拟静力试验方法,研究了狗骨钢梁局部屈曲对其节点性能产生的影响,并尝试通过在削弱部位设置加劲肋的方法约束削弱处的局部变形。研究结果表明:在梁翼缘削弱区通过合理设置加劲肋,可以延迟局部屈曲的出现,改善强度和刚度的退化问题,节点承载能力和塑性变形能力均可得到明显提高。
李军, 于征, 厉凤香
doaj
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